Designing an Interdisciplinary Forensic Chemistry Lab Module: The Impact of Environmental Factors on Treated Hair with Personal Care Products

IF 2.5 3区教育学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Chemical Education Pub Date : 2024-09-10 DOI:10.1021/acs.jchemed.4c00710

Jacqueline Guevara, Valeria Gonzalez, Julian A. Saenz, Melanie A. Samalot, Tanique Z. Jones, Luis Pablo Salmeron Covarrubias, Christopher J. Trejo, Somayeh Mohammadi, Hamidreza Sharifan

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Abstract

To enrich forensic chemical education, we designed an innovative laboratory module centered on forensic chemistry. This module integrates trace evidence analysis by examining human hair, offering students a hands-on learning experience with applications in forensic chemistry. The hypothesis is that the retention of hair care products in curly hair versus straight hair varies under different environmental conditions. We focused on two commonly used hair care products (oil and shampoo), each containing a unique blend of organic and inorganic components that undergo decomposition and are prone to photodegradation at outdoor crime scenes. Students learned the sunlight effects on hair imbued with chemical residues from hair products. Further, it provides students with hands-on experience with Fourier Transform Infrared (FTIR) Spectroscopy, Ultraviolet–Visible (UV–vis) Spectroscopy, and comparing pH changes. This lab design aims to provide students with a foundational understanding of how environmental factors influence the chemical properties of cosmetics applied to hair.

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设计跨学科法证化学实验室模块：环境因素对用个人护理产品处理过的头发的影响

为了丰富法证化学教育，我们设计了一个以法证化学为中心的创新实验模块。该模块通过检查人的头发来整合痕量证据分析，为学生提供法医化学应用方面的实践学习体验。我们的假设是，在不同的环境条件下，护发产品在卷发和直发中的留存率是不同的。我们重点研究了两种常用的护发产品（护发油和洗发水），每种产品都含有独特的有机和无机混合成分，在室外犯罪现场容易发生分解和光降解。学生们了解了阳光对含有美发产品化学残留物的头发的影响。此外，它还为学生提供了傅立叶变换红外（FTIR）光谱学、紫外-可见（UV-vis）光谱学和比较 pH 值变化的实践经验。本实验设计旨在让学生从根本上了解环境因素如何影响用于头发的化妆品的化学特性。

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来源期刊

Journal of Chemical Education 化学-化学综合

CiteScore

5.60

自引率

50.00%

发文量

465

审稿时长

6.5 months

期刊介绍： The Journal of Chemical Education is the official journal of the Division of Chemical Education of the American Chemical Society, co-published with the American Chemical Society Publications Division. Launched in 1924, the Journal of Chemical Education is the world’s premier chemical education journal. The Journal publishes peer-reviewed articles and related information as a resource to those in the field of chemical education and to those institutions that serve them. JCE typically addresses chemical content, activities, laboratory experiments, instructional methods, and pedagogies. The Journal serves as a means of communication among people across the world who are interested in the teaching and learning of chemistry. This includes instructors of chemistry from middle school through graduate school, professional staff who support these teaching activities, as well as some scientists in commerce, industry, and government.